Adding a Node.js application as a service on your Ubuntu server is pretty easy using Ubuntu's Upstart. Just create a config file at /etc/init/myapp.conf with the following:
#/etc/init/myapp.conf
description "Your app name here"
author "This would be you"

# Start the service after everything loaded
start on (local-filesystems and net-device-up IFACE=eth0)
stop on shutdown

To embed AngularJS (1.0.1) in a Drupal (6.x) site won't work out of the box. To get AngularJS to function you need to upgrade your jQuery to the latest 1.7.x version as the packaged jQuery and jquery update (1.3.2) will break AngularJS.

Now for the solution:
1. Install the latest dev version of jQuery Update and make your default jQuery 1.7.This That removed some errors but didn't quite cut it.